On Fri, 28 Nov 2008 03:28:32 -0800 (PST), bytestore <[EMAIL PROTECTED]> wrote: > > :) Many thanks, I did not know > > > Stroller-2 wrote: >> >> >> On 28 Nov 2008, at 07:02, bytestore wrote: >>> anybody, write programm digital "building" level >> >> The English word for this is a digital "spirit level". >> >> http://en.wikipedia.org/wiki/Spirit_level >> >> HTH, >> >> Stroller.
I explored this a couple months ago. My conclusion was that we didn't get enough precision and stability from the accelerometers for this purpose, without smoothing computations I didn't explore. My testing indicated, for example, that if the FR is laying on a 4-foot long shelf, you can raise or lower one end of that shelf by about an inch before being certain via /dev/input/event3 that you've in fact tilted the FR that direction. At about a half-inch it's clear that the values are changing, but the constant low-level fluctuations drown out your certainty, short of quite a bit more work (computationally, smoothing and comparing) than I was interested in putting into the project at the time. j _______________________________________________ Openmoko community mailing list [email protected] http://lists.openmoko.org/mailman/listinfo/community
